Patents by Inventor Klaus Piper

Klaus Piper has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus for frightening noxious animals by means of ultrasonic signals
    Patent number: 4933918
    Abstract: A device for frightening noxious animals by means of ultrasonic signals which includes an electro-acoustic transducer, having elements for electronic oscillation generation controlled by a freely programmable micro computer. The micro computer and the elements for the electronic oscillation generation are so designed that time-varying acoustic signals are randomly generated.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: June 12, 1990
    Inventors: Walter J. Landsrath, Klaus Piper